风林火山's Blog

该例子演示了SWT界面下的下拉框Combo构建及监听。

import org.eclipse.swt.SWT;
import org.eclipse.swt.events.ModifyEvent;
import org.eclipse.swt.events.ModifyListener;
import org.eclipse.swt.events.SelectionAdapter;
import org.eclipse.swt.events.SelectionEvent;
import org.eclipse.swt.layout.FillLayout;
import org.eclipse.swt.widgets.Combo;
import org.eclipse.swt.widgets.Display;
import org.eclipse.swt.widgets.Label;
import org.eclipse.swt.widgets.Shell;

public class ComboExample {
	public static void main(String[] args) {
		Display display = new Display();
		Shell shell = new Shell(display);
		shell.setText("Combo Example");
		shell.setBounds(100, 100, 200, 100);
		shell.setLayout(new FillLayout(SWT.VERTICAL));
		final Combo combo1 = new Combo(shell, SWT.READ_ONLY);
		final Combo combo2 = new Combo(shell, SWT.DROP_DOWN);
		final Label label = new Label(shell, SWT.CENTER);
		combo1.setItems(new String[] { "First", "Second", "Third" });
		combo1.setText("First");
		combo1.addSelectionListener(new SelectionAdapter() {
			public void widgetSelected(SelectionEvent event) {
				label.setText("Selected: " + combo1.getText());
			}
		});
		combo2.setItems(new String[] { "First", "Second", "Third" });
		combo2.setText("First");
		combo2.addModifyListener(new ModifyListener() {
			public void modifyText(ModifyEvent event) {
				label.setText("Entered: " + combo2.getText());
			}
		});
		shell.open();
		while (!shell.isDisposed()) {
			if (!display.readAndDispatch())
				display.sleep();
		}
		display.dispose();
	}
}